Messages in this thread | | | Subject | Re: 2.6.21-rc6-mm1 ima "BUG: held lock freed!" | From | Joseph Fannin <> | Date | Wed, 11 Apr 2007 09:55:18 -0400 |
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On Tue, 2007-04-10 at 15:00 -0400, Reiner Sailer wrote: > Joseph, > > we cannot reproduce the BUG you report. We have identified a potential > source (spinlock around mutex_init). I have attached a small patch that > removes this lock from the initialization of the hash table. I have > tested the patch but I cannot verify if this resolves the problem you > are seeing. > > If you can reproduce the problem, would you mind to apply this patch and > let us know if this solves the problem?
The BUG message no longer appears with this patch applied. It was 100% reproducible before, so I think this fixed it.
Thanks!
-- Joseph Fannin jfannin@gmail.com || jhf@columbus.rr.com
> > I'm seeing this while booting: > > > > ima (ima_init): No TPM chip found(rc = -19), activating TPM-bypass! > > > > ========================= > > [ BUG: held lock freed! ] > > ------------------------- > > swapper/1 is freeing memory c04c7660-c04c76a3, with a lock still held > > there! > > (ima_queue_lock){--..}, at: [<c0202710>] ima_create_htable+0x10/0x90 > > 1 lock held by swapper/1: > > #0: (ima_queue_lock){--..}, at: [<c0202710>] ima_create_htable+0x10/0x90 > > > > stack backtrace: > > [<c0105959>] dump_trace+0x1d9/0x210 > > [<c01059aa>] show_trace_log_lvl+0x1a/0x30 > > [<c0106612>] show_trace+0x12/0x20 > > [<c01066d6>] dump_stack+0x16/0x20 > > [<c014fd3a>] debug_check_no_locks_freed+0x17a/0x180 > > [<c014cdbf>] debug_mutex_init+0x1f/0x50 > > [<c0145451>] __mutex_init+0x41/0x50 > > [<c020277d>] ima_create_htable+0x7d/0x90 > > [<c020286f>] ima_init+0x3f/0x270 > > [<c051b765>] init_evm+0x1f5/0x250 > > [<c05015d2>] kernel_init+0x132/0x320 > > [<c010532f>] kernel_thread_helper+0x7/0x18 > > ======================= > > > > I saw this in -rc5-mm4 also. > > > > I couldn't find a contact address in MAINTAINERS, so I've CC'd the > > two authors listed on top of ima_create_htable.c , as well as the > > first submitter of the IMA stuff I found in my LKML archive. > > > > As an aside, this computer does have (some sort of) TPM chip, but > > the driver is built as a module, and not loaded at this point (not a > > worry for me, I don't intend to use it). > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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